Perhaps you should try some spelling variations:
duong thanh » dong thanh, muong thanh, luong thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
ban duong » ban huong, van duong, ban tuong
hoa cao » hoc cao, hoa co, hoa bao
hoa cac » hoa chat, chon cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (hieu lang)) - hanh tranh cua ban duong thanh ((hoa cao) OR (hoa cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - hanh tranh cua ban duong thanh ((hoa cao) OR (hoa cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - hanh tranh cua ban duong thanh ((hoa cao) OR (hoa cac))".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - hanh tranh cua ban duong thanh ((hoa cao) OR (hoa cac))*.